CN215042226U - Power battery charging balance management system - Google Patents

Power battery charging balance management system Download PDF

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Publication number
CN215042226U
CN215042226U CN202120869103.7U CN202120869103U CN215042226U CN 215042226 U CN215042226 U CN 215042226U CN 202120869103 U CN202120869103 U CN 202120869103U CN 215042226 U CN215042226 U CN 215042226U
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power battery
management system
power
pwm control
battery
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CN202120869103.7U
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Chinese (zh)
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王敬云
邝振潘
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Huizhou Mulong Electronic Technology Co ltd
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Huizhou Mulong Electronic Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract

The utility model relates to a battery charging management technical field specifically is a power battery balanced management system that charges, including connecting power, the balanced control circuit board that charges and a plurality of power battery of group, a plurality of power battery of group adopt parallel mode to connect in the balanced control circuit board that charges, charge the excessive pressure, overflow the scheduling problem to each power battery of group of managing each power battery that charges alone through the balanced control circuit board that charges, the utility model discloses can ensure the balance of every power battery charging voltage of group, improve battery utilization efficiency, prolong battery life to power battery's the chooseing requirement of relaxing relatively.

Description

Power battery charging balance management system
Technical Field
The utility model relates to a battery charging management technical field specifically is a power battery balance management system that charges.
Background
In order to meet the requirements of voltage, power and energy when high-power equipment such as an electric automobile runs, a battery pack is mostly formed by connecting a large number of power batteries in series for use. Although the difference between the batteries gradually decreases with the improvement of the technical process, it is still difficult to ensure the characteristics of each battery to be completely consistent under the current manufacturing process level.
Particularly, under the operating condition, irregular charging is frequently performed, and the difference between the batteries is deteriorated after the battery pack operates for a certain period of time, thereby causing a reduction in the use efficiency and a reduction in the life span of the battery pack. Inconsistencies between cells, which are present in particular at the beginning of their production, cannot be completely eliminated.
Therefore, it is desirable to design a battery management system that can charge the battery packs in a balanced manner.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model discloses a power battery balance management system that charges can ensure the balance of every power battery charging voltage of group, improves battery utilization efficiency, extension battery life.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a power battery balance management system that charges, includes power, the balance control circuit board that charges and two sets of at least power battery, the balance control circuit board that charges includes step-down circuit, multi-winding transformer and two at least battery protection circuit, the multi-winding transformer is equipped with primary winding, first secondary winding and second secondary winding, step-down circuit connects primary winding, primary winding A end connection, battery protection circuit connects the second secondary winding, power battery all is connected with battery protection circuit, the second secondary winding is equipped with two sets of at least output group.
Furthermore, the voltage reduction circuit is provided with a PWM control IC which is provided with GATE, FB, RI, SENSE, VDD and GND; VDD of the PWM control IC is connected with a power supply and the end C of the first secondary winding, RI is respectively connected with SENSE and VDD, and VDD is connected with the power supply and is connected with two resistors R13 and R16 in series on a circuit.
Further, an N-channel enhancement type MOS tube is arranged between the GATE of the PWM control IC and the end B of the primary winding, the GATE of the PWM control IC is connected with the grid electrode of the MOS tube, the drain electrode of the MOS tube is connected with the end A of the primary winding, and the source electrode of the MOS tube is connected with the SENSE of the PWM control IC.
Furthermore, the battery protection circuit is provided with a lithium battery management chip, the lithium battery management chip comprises CE, VCC, PROG, TEMP, BAT and GND, the VCC and CE are connected with one end of the output group, the other end of the output group is connected with the BAT of the lithium battery management chip, and the power battery is connected between the other end of the output group and the BAT of the lithium battery management chip in parallel.
Furthermore, the voltage reduction circuit is also provided with a photoelectric coupler, the output direction of the photoelectric coupler is connected with FB of the PWM control IC, the input direction of the photoelectric coupler is connected with a voltage reference integrated circuit, and the voltage end of the voltage reference integrated circuit is connected with VCC of the lithium battery management chip.
Furthermore, the A end of the primary winding is connected with six resistors in parallel, and the six resistors perform negative half-cycle reverse discharge for the transformer and mainly play a role in protecting the MOS tube.
Furthermore, TEMP, PROG and GND of the lithium battery management chip are connected to the negative electrode of the power battery in parallel, and the PROG is also connected with a resistor in series.
Furthermore, there are three electric capacity in parallel between the VCC of lithium battery management chip and the output group other end for restrain surge voltage wherein two electric capacity are the electric capacity that has polarity, and one is nonpolarity electric capacity.
Furthermore, the source electrode of the MOS tube is provided with three resistors which are grounded in parallel, so that the MOS tube is prevented from being damaged.
The working principle is as follows:
the input of voltage generates a loop through the transformer and the MOSFET. The switching of the MOSFETs is controlled by a PWM control IC.
When the charger is plugged in, the PWM control IC chip starts power supply, and the current is limited by the resistors R13 and R16 and then supplied to the PWM control IC chip for starting.
After the PWM control IC is started, the MOS tube is controlled to be switched on and off to enable the multi-winding transformer to generate an induced magnetic field, an electromotive force output voltage is generated at the output end, the voltage is controlled by the voltage reference integrated circuit, and the voltage is fed back to the PWM control IC by the photoelectric coupler to make output MOS tube adjustment output.
The output voltage is repeatedly controlled in this manner to maintain the battery charging voltage.
The utility model has the advantages that
The utility model discloses a power battery balance management system that charges is equipped with the balanced circuit board that charges, and multiunit power battery adopts the parallel connection balanced circuit board that charges, through the balanced circuit board that charges, can ensure the balance of every power battery charging voltage of group, improves battery utilization efficiency, extension battery life to power battery's the requirement of chooseing for use is relaxed relatively.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a voltage reducing circuit of the present invention (the thick line part in the figure is an excessive current);
fig. 2 is a schematic diagram a of a battery protection circuit of the present invention;
fig. 3 is a schematic diagram B of the battery protection circuit of the present invention;
description of reference numerals: PWM control IC-1, multi-winding transformer-2, lithium battery management chip-3.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout, which are exemplary and are intended to be illustrative only and not to be construed as limiting the invention, and, accordingly, the description is for the purpose of illustration only and the practice of the inventive concepts herein is not intended to be limited solely to the exemplary embodiments described herein and the illustrations in the drawings, which are not intended to be limiting.
As shown in fig. 1-3:
example 1
The utility model provides a power battery balance management system that charges, includes power, the balance control circuit board that charges and at least two sets of power battery, in this embodiment to the 72V power as an example, the circuit is suitable for 48V-72V, and this system is connected with external power supply through the interface that charges, the balance control circuit board that charges includes step-down circuit, multi-winding transformer 2 and 13 battery protection circuit, multi-winding transformer 2 is equipped with primary winding, first secondary winding and second secondary winding, step-down circuit connects primary winding, primary winding A end connecting power, battery protection circuit connects the second secondary winding, power battery all is connected with battery protection circuit, the second secondary winding is equipped with 13 output groups.
The voltage reduction circuit is provided with a PWM control IC1, in the embodiment, a TC-2263 model is adopted for the PWM control IC1, and the PWM control IC1 is provided with GATE, FB, RI, SENSE, VDD and GND; VDD of a PWM control IC1 is connected with a power supply and a first secondary winding C end, a first secondary winding D end is grounded, RI is respectively connected with SENSE and VDD, VDD is connected with the power supply and is connected with two resistors R13 and R16 in series on a circuit, an N-channel enhancement type MOS (metal oxide semiconductor) tube is arranged between a GATE of the PWM control IC1 and a primary winding B end, the GATE of the PWM control IC1 is connected with a grid electrode of an MOS tube, and is connected with resistors R19 and R20 in series on a connecting circuit, a drain electrode of the MOS tube is connected with a primary winding A end, and a source electrode of the MOS tube is connected with SENSE of the PWM control IC 1.
The battery protection circuit is provided with a lithium battery management chip 3, in the embodiment, the lithium battery management chip 3 adopts an AP-5056 model, the lithium battery management chip 3 comprises CE, VCC, PROG, TEMP, BAT and GND, the VCC and CE are connected with one end of an output group, the other end of the output group is connected with the BAT of the lithium battery management chip 3, the power battery is connected between the other end of the output group and the BAT of the lithium battery management chip 3 in parallel, the TEMP, PROG and GND of the lithium battery management chip 3 are connected to the negative electrode of the power battery in parallel, the PROG is also connected with a resistor in series, the resistance value of the resistor is 1K, and three capacitors are connected between the VCC of the lithium battery management chip 3 and the other end of the output group in parallel and used for suppressing surge voltage.
The voltage reduction circuit is also provided with a photoelectric coupler, the output direction of the photoelectric coupler is connected with FB of the PWM control IC1, the input direction of the photoelectric coupler is connected with a voltage reference integrated circuit, and the voltage end of the voltage reference integrated circuit is connected with VCC of the lithium battery management chip 3.
The A end of the primary winding is connected with six resistors in parallel, the resistance value of each resistor is 100K, and the six resistors are used for negative half-cycle reverse discharge of the transformer and mainly play a role in protecting the MOS tube.
The TEMP, PROG and GND parallel connection of lithium battery management chip 3 are to the power battery negative pole, and PROG has still established ties a resistance, and the resistance is 1K, the VCC and the output of lithium battery management chip 3 are organized between the other end and are parallelly connected three electric capacity for restrain surge voltage.
The MOS tube source electrode is provided with three resistors which are grounded in parallel, and the MOS tube is prevented from being damaged.
Principle of operation
The input of 72V voltage generates a loop through the transformer and the MOSFET. The switching of the MOSFETs is controlled by a PWM control IC 1.
When the charger is plugged in, the PWM control IC1 chip starts power supply, and the current is limited by the resistors R13 and R16 and then supplied to the PWM control IC1 for starting.
After the PWM control IC1 is started, the MOS transistor is controlled to be turned on and off to generate an induced magnetic field in the multi-winding transformer 2, an electromotive force output voltage is generated at the output terminal, the voltage level is controlled by the voltage reference integrated circuit, and the voltage level is fed back to the PWM control IC1 by the photoelectric coupler to make the output MOS transistor adjust and output.
The output voltage is repeatedly controlled in this manner to maintain the charging voltage of the battery 5V.
Example 2
In this embodiment, the lithium battery management chip 3 is of a model number TP-4056.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art. It should be noted that the technical features not described in detail in the present invention can be implemented by any prior art.

Claims (9)

1. A power battery charging balance management system is characterized in that: including power, balanced control circuit board and at least two sets of power battery charge, balanced control circuit board charges includes step-down circuit, multi-winding transformer and two at least battery protection circuit, the multi-winding transformer is equipped with primary winding, first secondary winding and second secondary winding, step-down circuit connects primary winding, primary winding A end connecting power, battery protection circuit connects the second secondary winding, power battery all is connected with battery protection circuit, the second secondary winding is equipped with at least two sets of output group.
2. The power battery charge balance management system of claim 1, wherein: the voltage reduction circuit is provided with a PWM control IC, and the PWM control IC is provided with GATE, FB, RI, SENSE, VDD and GND; VDD of the PWM control IC is connected with a power supply and the end C of the first secondary winding, RI is respectively connected with SENSE and VDD, and VDD is connected with the power supply.
3. The power battery charge balance management system of claim 1, wherein: an N-channel enhancement type MOS tube is arranged between the GATE of the PWM control IC and the end B of the primary winding, the GATE of the PWM control IC is connected with the grid electrode of the MOS tube, the drain electrode of the MOS tube is connected with the end A of the primary winding, and the source electrode of the MOS tube is connected with the SENSE of the PWM control IC.
4. The power battery charge balance management system of claim 1, wherein: the battery protection circuit is provided with a lithium battery management chip, the lithium battery management chip comprises CE, VCC, PROG, TEMP, BAT and GND, the VCC and CE are connected with one end of the output group, the other end of the output group is connected with the BAT of the lithium battery management chip, and the power battery is connected between the other end of the output group and the BAT of the lithium battery management chip in parallel.
5. The power battery charge balance management system of claim 4, wherein: the voltage reduction circuit is also provided with a photoelectric coupler, the output direction of the photoelectric coupler is connected with FB of the PWM control IC, the input direction of the photoelectric coupler is connected with a voltage reference integrated circuit, and the voltage end of the voltage reference integrated circuit is connected with VCC of the lithium battery management chip.
6. The power battery charge balance management system of claim 1, wherein: six resistors are connected in parallel at the end A of the primary winding.
7. The power battery charge balance management system of claim 4, wherein: the TEMP, the PROG and the GND of the lithium battery management chip are connected to the negative electrode of the power battery in parallel.
8. The power battery charge balance management system of claim 4, wherein: three capacitors are connected in parallel between the VCC of the lithium battery management chip and the other end of the output group.
9. The power battery charge balance management system of claim 3, wherein: the source electrode of the MOS tube is provided with three resistors which are connected in parallel and grounded.
CN202120869103.7U 2021-04-26 2021-04-26 Power battery charging balance management system Active CN215042226U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120869103.7U CN215042226U (en) 2021-04-26 2021-04-26 Power battery charging balance management system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120869103.7U CN215042226U (en) 2021-04-26 2021-04-26 Power battery charging balance management system

Publications (1)

Publication Number Publication Date
CN215042226U true CN215042226U (en) 2021-12-07

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Application Number Title Priority Date Filing Date
CN202120869103.7U Active CN215042226U (en) 2021-04-26 2021-04-26 Power battery charging balance management system

Country Status (1)

Country Link
CN (1) CN215042226U (en)

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